Y-pedal's two stage RC drive..........

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Hey Guys,

This is a drive I just finished for Y-pedal. This is the first completed two stage drive (all others have been single stage).

You can see it is 7and 1/2 inches long and 5 inches high when folded up. Layed out, it is 11 inches long.

The entire drive pretty much fits in my hand (a little bigger than that). The Astro fits my drive so perfectly well. I am very pleased with this.

Overall ratio is roughly 10 to 1.

Anyway, I figured you guys would get a kick out of seeing a completed two stage drive. :D

So, Y-pedal, I am leaving on vacation tomorrow. Maybe I can make it to the post office to ship this, maybe I will have to ship it Tuesday. :wink:

Matt
 

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That looks better than the single stagers, IMHO. But Y does Ypedal need two stages when everyone else is running one with the same motor?

Oh, I hope Ypedal sends Matt the PM, next tuesday is sooo far away. Where is he? I can't watch this anymore. :)
 
The main reason/s most people have opted for single stage is two fold;

#1 Cost. The dual stage is almost twice as much as the single stage.

#2 Efficiency and weight. The dual stage drive loses a few percent efficiency.

Y-pedal wanted teh two stage so he could run a higher KV motor and still have the reduction he wanted without a huge sprocket at the rear wheel. With dual stage, you can run a relatively small rear sprocket.

Also, I think he wanted the cool factor. 8)

Matt
 
very nice

That Astro does tuck in the concave arm nicely.

Matt, who supplied the threaded (assuming sprocket thread) output? Ypedal?
 
Hey Man,

I just commented on your thread. :D

I had those freewheel adaptors made up. I have dozens of them. Would you like one? I have them in aluminum and steel.

They are 1/2 inch bore, dual set screw style.

Matt
 
OMG!!!

ART!!! You're an artist Matt!! I'm going to have to bill you for the replacement keyboard, as this one seems to have shorted out from the drool!!!

Beautiful!!! I love how it can have it's layout adjusted, it's so well done! Beautiful!

-Luke
 
Yeah !!! :D :D :D :D :D :D

That thing looks incredible ! even better than i imagined .. the black and silver turned out perfectly !

This bad boy will drive a NuVinci hub in a 20" Sunrims Rhyno Lite, this should give me a nice wide range with really good low speed grunt.

Next item on my list is the HV controller.. :wink:

Thank you Matt !!! lookin amazing.. if it works half as good as it looks.. watch out ! :twisted:
 
Totally awesome 8)

By the way how did Y get a black pulley? :evil: not jealous at all :D

Y, is this going on the Norco or is there a new bike in the wings? :mrgreen:

Cheers,

D
 
Ypedal said:
Yeah !!! :D :D :D :D :D :D

That thing looks incredible ! even better than i imagined .. the black and silver turned out perfectly !

This bad boy will drive a NuVinci hub in a 20" Sunrims Rhyno Lite, this should give me a nice wide range with really good low speed grunt.

Next item on my list is the HV controller.. :wink:

Thank you Matt !!! lookin amazing.. if it works half as good as it looks.. watch out ! :twisted:

Incredible....

The drive itself has two stages, with a total reduction of 10:1...
There will be a third stage when it is on the bike from the drive unit to the wheel sprocket...
Then a fourth stage within the hub itself (IIRC the Nuvinci is gear from 0.5 to 2.5) :shock: :shock: :shock:

What a conglomeration of gearing....mind boggling. The ability to modify the gearing ratios should be wide open.....imagine if you put a cluster on the nuvinci!

You could theoretically gear down enough to climb Mt Everest then go down the other side at a couple hundred KPH :twisted:
 
dontsendbubbamail said:
How does that motor get away with no cooling vents?

Bubba

Higher-end RC-based motors, such as the 3210, run pretty efficient, even at pretty high peak power levels, so they just don't get very hot.

-- Gary
 
GGoodrum said:
dontsendbubbamail said:
How does that motor get away with no cooling vents?
Higher-end RC-based motors, such as the 3210, run pretty efficient, even at pretty high peak power levels, so they just don't get very hot.

Also, it's an inrunner, so there's good thermal conduction from the armature direct to the motor case.
 
KEWL!!!!!

realy sweet eyecandy. if it runs 1/10th as good as it looks you'll have a sweet ride. a conversation piece anyway

just envy talking here.

rick
 
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